*{
  margin: 0;
  padding: 0;
  font-family: 'Poppins',sans-serif;
}
body{
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  background: #040d15;
}
a{
  position: relative;
  display: inline-block;
  padding: 12px 36px;
  margin: 10px 0;
  color: #fff;
  text-decoration: none;
  text-transform: uppercase;
  font-size: 18px;
  letter-spacing: 15px;
  border-radius: 40px;
  overflow: hidden;
  background: linear-gradient(90deg,#0162c8,#55e7fc);
}
a:nth-child(2){
  background: linear-gradient(90deg,#755bea,#ff72c0);
}
span{
  position: absolute;
  background: #fff;
  transform: translate(-50%,-50%);
  pointer-events: none;
  border-radius: 50%;
  animation: animate 1s linear infinite;
}
@keyframes animate
{
  0%
{
  width: 0px;
  height: 0px;
  opacity: 0.5;
}
100%
{
  width: 500px;
  height: 500px;
  opacity: 0;
}
}